When a computer has multiple CPU groups, enabling this element causes the runtime to distribute managed threads across all CPU groups. To use this feature, you must also enable the <GCCpuGroup> element, which extends garbage collection to all CPU groups and takes all cores into account when creating and balancing heaps. Enabling the <GCCpuGroup> element requires enabling the <gcServer> element. If these elements are not enabled, enabling the <Thread_UseAllCpuGroups> element has no effect.